You're right. I get Dorman direct-fit sensors from Rockauto for $40 each and they have a lifetime warranty. If the battery goes dead, I just order a new one from Rockauto and send back the core for a full refund. All it costs me is around $3 for the shipping the core back. Even the trigger tool to "wake-up" and register the sensors aren't expensive; you can purchase one online for under $20. Just ground the TPMS diagnostic connector wire 6x in 10-secs. after turning the key on puts the TPMS in program mode. Take the trigger tool to the left-front wheel and place next to the tire near the valve stem and hit the button. The exterior lights flash when the sensor is triggered. Go, in order, to the right-front, right-rear and left-rear tires and repeat the process making sure the exterior lights flash after each time and turn off the ignition. Registration complete in a couple of minutes!Why not just fix it. Sensors are reasonably priced these days. I don't understand why people work so hard to not fix something right.